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公开(公告)号:US5487425A
公开(公告)日:1996-01-30
申请号:US310486
申请日:1994-09-22
申请人: Takamasa Ohno , Keietsu Kato , Yoshiyuki Yamaguchi , Masami Murakami , Shogo Suzuki , Shoichi Kanda , Tsuyoshi Nakagawa
发明人: Takamasa Ohno , Keietsu Kato , Yoshiyuki Yamaguchi , Masami Murakami , Shogo Suzuki , Shoichi Kanda , Tsuyoshi Nakagawa
摘要: The present invention provides a composition for recovery of petroleum and gas, which comprises (a) a copolymer having a molecular weight of 100,000 or more, composed of 30-75 mole % of N-vinylpyrrolidone unit, 5-70 mole % of (meth)acrylamide unit and 0-20 mole % of (meth)acrylic acid unit or a salt thereof, (b) a water-soluble aldehyde, (c) a phenol compound, and (d) water. This composition can form a gel in a required gelling time even at high temperatures and even in the presence of bivalent metal ions and accordingly can be used for efficient recovery of petroleum and gas.
摘要翻译: 本发明提供回收石油和天然气的组合物,其包含(a)分子量为100,000以上的共聚物,由30-75摩尔%的N-乙烯基吡咯烷酮单元,5-70摩尔%的(甲基) )丙烯酰胺单元和0〜20摩尔%的(甲基)丙烯酸单元或其盐,(b)水溶性醛,(c)酚化合物和(d)水。 即使在高温下甚至在二价金属离子的存在下,该组合物也可以形成所需胶凝时间的凝胶,因此可以有效回收石油和天然气。